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1/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information samsung tft-lcd product information model : LTM270CS01 samsung tft samsung tft - - lcd product information lcd product information model : LTM270CS01 model : LTM270CS01 issued date : 2008-02-13 application engineering part 1, hd lcd division samsung electronics co . , ltd. www.datasheet.co.kr datasheet pdf - http://www..net/
2/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information contents general description ------------------------------- -------------------------------------------------- ( 3) 1. absolute maximum ratings ----------------------- -------------------------------------------- (4) 2. optical characteristics ------------------------ --------------------------------------------------- (6) 3. electrical characteristics --------------------- ------------------------------------------------- (1 2) 3.1 tft lcd module 3.2 back light unit 4. block diagram ---------------------------------- ------------------------------------------------- (1 7) 4.1 tft lcd module 4.2 back light unit 5. input terminal pin assignment ------------------ -------------------------------------------- (18) 5.1.1 input signal & power 5.1.2 inverter input connector 5.2 back light unit 5.3 input signals, basic display colors and gray scale of each color 6. interface timing --------------------------------------------------------------------------------- (23) 6.1 timing parameters (de only mode) 6.2 timing diagrams of interface signal (de only mode) 6.3 power on/off sequence 6.4 inverter power sequence 6.5 vdd power dip condition 7. outline dimension ------------------------------------------------------------------------------- (28) 8. general precaution ----------------------------------------------------------------------------- (31) 8.1 handling 8.2 storage 8.3 operation 8.4 others www.datasheet.co.kr datasheet pdf - http://www..net/
3/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information workstation & desktop monitors display terminals for av application products monitors for industrial machine * if the module is used to other applications besid es the above, please contact sec in advance. features general description description applications general information high contrast ratio, high aperture structure, high color gamut s-pva (super patterned vertical alignment) mode wide viewing angle high speed response wuxga (1920 x 1200 pixels) resolution direct type b/l unit with 8 u-type ccfls (cold catho d fluorescent lamp) de (data enable) mode lvds (low voltage differential signaling) interface (2pixel/clock) rohs compliance pb-free compliance LTM270CS01 is a color active matrix liquid crystal display (lcd) that uses amorphous silicon tft (thin film transistor) as switching com ponents. this model is composed of a tft lcd panel, a driver circuit and a back light unit. the resolution of a 27.0 is 1920 x 1200 and this model can display up to 1,074 milli ons colors. mm 0.303 x 0.303 pixel pitch mm 581.76(h) x 363.6(v) active display area note haze 44%, hard coating 3h surface treatment cd/ O 400(typ.) luminance of white normally black display mode rgb vertical stripe pixel arrangement pixel 1920 x 1200 number of pixels colors 1,074m display colors unit specification items www.datasheet.co.kr datasheet pdf - http://www..net/
4/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information note (1) mechanical tolerance is 0.5mm unless there is a special comment. mechanical information 1. absolute maximum ratings if the condition exceeds maximum ratings, it can ca use malfunction or unrecoverable damage to the device. note (1) ta= 25 2 c v 6.5 gnd-0.5 v dd power supply voltage v 5 - v sig data signal (3) g 1.5 - v nop vibration ( non - operating ) (2) g 50 - s nop shock ( non - operating ) 50 0 t opr glass surface temperature (operation) (1) 60 -20 t stg storage temperature note unit max. min. symbol item 3,800 - - - - max. w/ inverter assembly g - - lcd module only g - - weight w/ inverter assy mm 41.6 - depth (d) mm 397.6 - vertical (v) w/o inverter assy mm 615.8 - horizontal (h) module size note unit typ. min. item www.datasheet.co.kr datasheet pdf - http://www..net/
5/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information (1) temperature and relative humidity range are sho wn in the figure below. a. 90 % rh max. (ta 39 c) b. maximum wet-bulb temperature at 39 c or less. (ta 39 c) c. no condensation (2) 11ms, sine wave, one time for x, y, z axis (3) 10-300 hz, sweep rate 10min, 30min for x,y,z ax is fig. temperature and relative humidity range (39,90) (39,90) (60,27.7) (60,27.7) (50,50.4) (50,50.4) ( ( - - 25,5) 25,5) (39,90) (39,90) (60,27.7) (60,27.7) (50,50.4) (50,50.4) ( ( - - 25,5) 25,5) www.datasheet.co.kr datasheet pdf - http://www..net/
6/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 2. optical characteristics * c.g.l : color grayscale linearity (continue to the next page) (3) sr-3 - 1,300 1,000 sr-3 (7),(8) (6) sr-3 cd/m2 - 400 (350) y l luminance of white (center of screen) g-to-g bm-7 msec - 6 - t g-g,avg (5) bm-7 20 16 - tr + tf on/off response time msec normal l,r =0 u,d =0 viewing angle (9) 0.02 - - u'v' white c.g.l 0.468 wv' 0.198 wu' white 0.176 bv' 0.166 bu' blue 0.572 gv' 0.068 gu' green 0.524 rv' - 0.494 - ru' red color chromaticity (cie 1976) 0.329 wy 0.313 wx white 0.069 by 0.147 bx blue 0.704 gy 0.189 gx green 0.318 ry +0.030 0.675 -0.030 rx red color chromaticity (cie 1931) w/ sic - 3,000 2,000 c/r contrast ratio (center of screen) note unit max. typ. min. condition symbol item the optical characteristics should be measured in a dark room or equivalent. measuring equipment : topcon bm-7,spectroradiometer sr-3 (ta = 25 2 c, vdd=5v, fv= 60hz, fdclk=77mhz, il = (6.0)marms) www.datasheet.co.kr datasheet pdf - http://www..net/
7/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information (4) sr-3 % 25 - - b uni brightness uniformity (13 points) k - 6500 - - color temperature % - 102 - - color gamut note unit max. typ. min. condition symbol item - 65 - d - 65 - u ver. - 75 - r (8) sr-3 degrees - 75 - cr 100 l hor. viewing angle - 89 - d - 89 - u ver. - 89 - r (8) sr-3 degrees - 89 - cr 10 l hor. viewing angle note (1) test equipment setup the measurement should be executed in a stable, win dless and dark room between 30min after lighting the back light at the given te mperature for stabilization of the back light. this should be measured in the c enter of screen. single lamp current : 6.0ma environment condition : ta = 25 2 c 2 bm-7 1 sr-3 field photo detector photo detector lcd panel tft - lcd module the center of the screen sr-3 : 50 M bm-7 : 50 M field www.datasheet.co.kr datasheet pdf - http://www..net/
8/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information note (2) definition of test point 13 192 576 960 1344 1728 120 600 1080 8 3 2 1 6 11 12 10 5 4 9 7 360 840 active area : test point note (3) definition of contrast ratio (c/r) : ratio of gray max (gmax) & gray min (gmin) at the center point of the panel note (4) definition of 13 points brightness unifor mity (full white pattern) buni b b b = - 100 ( max min) max bmax : maximum brightness bmin : minimum brightness cr g g = max min * if the dynamic c/r operating is applied to 270m1- l01 gmax : luminance with all pixels white. gmin : luminance with all pixels black. www.datasheet.co.kr datasheet pdf - http://www..net/
9/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information note (5) definition of response time a. on/off response time : sum of tr, tf b. gray to gray response time - measuring gray : 31 63, 63 95,95 127, 127 159, 159 191, 191 223 grays and vice versa - t g-g, avg : average response time of ones between above grays black (tft off) white (tft on) black (tft off) 100% 90% 10% 0% t r t f optical response display data 96 gray 128 gray 95 gray 127 gray gray to gray response black 0% 100% 10% 90% t r t f white (example) time www.datasheet.co.kr datasheet pdf - http://www..net/
10/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information note (6) definition of luminance of white : luminan ce of white at center point note (7) definition of color chromaticity (cie 1931 , cie1976) color coordinate of red, green, blue & white at cent er point note (8) definition of viewing angle : viewing angle range (cr 10, cr 100) www.datasheet.co.kr datasheet pdf - http://www..net/
11/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information note (9) color grayscale linearity a. test image : 100% full white pattern with a test pattern as below b. test pattern : squares, 40mm by 40mm in size, fi lled with 255, 225, 195, 165, 135 and 105 grays steps should be arranged at the center of the screen. c. test method -1 st gray step : move a square of 255 gray level sh ould be moved into the center of the screen and measure luminance and u and v coordi nates. - next gray step : move a 225 gray square into the c enter and measure both luminance and coordinates, too. d. test evaluation where a, b : 2 gray levels found to have the larges t color differences between them i.e. get the largest u and v of each 6 pair of u and v and calculate the uv. d u' v' = (u' - u' ) + (v' - v' ) a b 2 a b 2 www.datasheet.co.kr datasheet pdf - http://www..net/
12/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 3.1 tft lcd module the connector for display data & timing signal shoul d be connected. (gnd=0v) ta = 25 c note (1) the ripple voltage should be controlled un der 10% of v dd . 3. electrical characteristics input current common mode voltage input voltage range (single-ended) differential input voltage lvds skew differential input voltage for lvds receiver threshold (4) v 2.4 - 0 v in ? 10 i in (4) v 2.4- |v id |/2 1.2 0+ |v id |/2 v cm (4) mv 600 - 200 |v id | (3) 300 - -300 t skew (7) a 4.5 - - i rush rush current mhz 81.0 77.0 72.0 f dclk main frequency khz 78.5 74 69 f h hsync frequency hz 63 60 57 f v vsync frequency ma 3000 2600 - (c) dot ma - 2200 - (b) white (5),(6) ma - 1600 - i dd (a) black current of power supply mv - - -100 low (2) mv +100 - - high lvds input characteri stics (1) v 5.5 5.0 4.5 v dd voltage of power supply note unit max. typ. min. symbol item www.datasheet.co.kr datasheet pdf - http://www..net/
13/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information (2) differential receiver voltage definitions and propa gation delay and transition time test circuit a. all input pulses have frequency = 10mhz, t r or t f =1ns b. c l includes all probe and fixture capacitance note a. note b. (4) definition of v id and v cm using single-end signals (3) lvds receiver dc parameters are measured under static and steady conditions which may not be reflective of its performance in t he end application. where tskew : skew between lvds clock & lvds data, t : 1 period time of lvds clock cf) (-/+) of 380psec means lvds data goes before or after lvds clock. differential lvds data rx +/- t skew t v diff = 0v v diff = 0v differential lvds clk www.datasheet.co.kr datasheet pdf - http://www..net/
14/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information (5) fv=60hz, fdclk = 77mhz, vdd = 5.0v, dc current. (6) power dissipation check pattern (lcd module onl y) rush current i rush can be measured when t rush . is 470 ? . t rush =470 ? 100% gnd 90% 10% v dd (7) measurement condition a) black pattern b) white pattern c) dot pattern www.datasheet.co.kr datasheet pdf - http://www..net/
15/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information the back light unit is a direct type with 8 u-type ccfls ( cold cathode fluorescent lamp ) the characteristics of a lamp is shown in the follo wing table. ta=25 2 c 3.2 back light unit note (1) specified values are for a single lamp. lamp current is measured with current meter for hig h frequency as shown below. refer to the following block diagram of the back li ght unit for more information. fig. measurement point of lamp current lcd module inverter inverter socket socket socket socket socket socket socket socket vrms - 1970 - v l lamp voltage 25 : 2540 (6) vrms 0 : 3180 - - vs startup voltage 1.5554 1.414 1.2726 wdis distortion rate (5) % 10 - - wasy asymmetry rate inverter waveform (4) hour - - 30,000 hr operating life time (3) khz 60 - 40 f l lamp frequency @6.0ma % 100 30 pwm dimming ratio (1) marms 7.0 6.0 5.0 i l lamp current note unit max. typ. min. symbol item www.datasheet.co.kr datasheet pdf - http://www..net/
16/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information (3) lamp frequency which may produce interference w ith horizontal synchronous frequency may cause line flow on the display. theref ore lamp frequency should be detached from the horizontal synchronous frequency a nd its harmonics as far as possible in order to avoid interference. (4) life time (hr) is defined as the time when brig htness of a lamp unit itself becomes 50% or less than its original value at the conditio n of ta = 25 2 c and i l = 7.0marms (2) define of lamp current uniformity : i uni i uni = - | | i i i max min max 100 i max : maximum lamp current i min : minimum lamp current lamp current uniformity i uni should be less than 25% (5) designing a system inverter intended to have bet ter display performance, power efficiency and lamp reliability. they would help increase the lamp lifetime and redu ce leakage current. a. the measurement should be done at typical lamp c urrent. b. the asymmetry rate of the inverter waveform shou ld be less than 10%. c. the distortion rate of the waveform should be 2 with 10% tolerance. - inverter output waveform had better be more simila r to ideal sine wave. | | i i i rms p - p - 100 asymmetry rate distortion rate (6) if an inverter has shutdown function, it should keep its output for over 1 second even if the lamp connector is open. otherwise the la mps may not be turned on. fig. wave form of the inverter | | i i rms p | | i i rms - p or i p i -p www.datasheet.co.kr datasheet pdf - http://www..net/
17/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 4. block diagram 4.2 back light unit 4.1 tft lcd module socket hot 1, 2 hot 3, 4 hot 5, 6 hot 7, 8 hot 9, 10 hot 11, 12 ccfl 1 ccfl 3 ccfl 5 ccfl 7 ccfl 2 ccfl 4 ccfl 6 ccfl 8 hot 13, 14 hot 15, 16 socket socket socket socket socket socket socket power circuit column driver circuit tft-lcd (1920 x rgb x 1200 pixels) s1 s1920 timing controller source driver ics lvds (rx) lvds(rx) rsds(tx) control signal rsds cn1 lvds pair #1 lvds pair #2 +5.0v v dd control signal www.datasheet.co.kr datasheet pdf - http://www..net/
18/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information * if the system already uses the 32,33pins, it shou ld keep under gnd level the voltage applied to those pins should not exceed -200mv. 5. input terminal pin assignment 5.1.1 input signal & power ( connector : uju ip125-c 41b-c42) positive lvds differential data output rxo3p 11 negative lvds differential data output rxo4n 12 positive lvds differential data output rxo4p 13 ground gnd 14 negative lvds differential data output rxe0n 15 positive lvds differential data output rxe0p 16 negative lvds differential data output rxe1n 17 positive lvds differential data output rxe1p 18 negative lvds differential data output rxe2n 19 positive lvds differential data output rxe2p 20 negative sampling clock (even data) rxecn 21 positive sampling clock (even data) rxecp 22 negative lvds differential data output rxe3n 23 positive lvds differential data output rxe3p 24 positive lvds differential data output negative lvds differential data output ground gnd 41 vdd 40 vdd 39 power supply : +5v vdd 38 vdd 37 vdd 36 vdd 35 ground gnd 34 * ctl (for lcd internal use only. do not connect) nc 33 * ce (for lcd internal use only. do not connect) nc 32 ground gnd 31 - high (3.3v) : dcc disable - low(0v) : dcc enable do not float the pin. dcc control 30 * smart inverter control disable. - high (3.3v) : sic disable - low(0v) : sic enable do not float the pin. sic control 29 ground gnd 28 ground gnd 27 positive lvds differential data output rxe4p 26 negative lvds differential data output rxe4n 25 negative lvds differential data output rxo3n 10 positive sampling clock (odd data) rxocp 9 negative sampling clock (odd data) rxocn 8 positive lvds differential data output rxo2p 7 negative lvds differential data output rxo2n 6 positive lvds differential data output rxo1p 5 negative lvds differential data output rxo1n 4 rxo0p 3 rxo0n 2 ground gnd 1 function symbol pin no www.datasheet.co.kr datasheet pdf - http://www..net/
19/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 5.1.2. inverter input connector : 20022wr-14(l)(ye onho) or compatible. normal =0~0.8v abnormal=3.0~5.0v lamp operating status status 14 dimming rage : 0~2.2v pwm dimming control signal v br 13 on : 2.4v~5..25v off : 0.0~0.8v bl on/off control signal v on 12 no connection vs 11 power ground gnd 10 power ground gnd 9 power ground gnd 8 power ground gnd 7 power ground gnd 6 power supply, +24v v bl 5 power supply, +24v v bl 4 power supply, +24v v bl 3 power supply, +24v v bl 2 power supply, +24v v bl 1 notes description symbol pin www.datasheet.co.kr datasheet pdf - http://www..net/
20/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information note) pin number starts from left side a. all gnd pins should be connected together and a lso be connected to the lcds metal chassis. b. all power input pins should be connected togethe r. c. all nc pins should be separated from other signa l or power. pin no. 1 pin no. 41 control pcb fig. connector diagram #41 #1 www.datasheet.co.kr datasheet pdf - http://www..net/
21/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 5.2 back light unit high voltage hot 6-2 high voltage hot 6-1 high voltage hot 7-2 high voltage hot 7-1 high voltage hot 4-2 high voltage hot 4-1 high voltage hot 3-2 high voltage hot 3-1 socket type connector part no. high voltage hot 8-2 high voltage hot 8-1 high voltage hot 5-2 high voltage hot 5-1 high voltage hot 2-2 high voltage hot 2-1 high voltage hot 1-2 high voltage hot 1-1 function input pin no. www.datasheet.co.kr datasheet pdf - http://www..net/
22/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 5.3 input signals, basic display colors and gray sc ale of each color 1 1 1 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 1 0 1 0 1 0 1 0 b 7 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 b 8 0 0 0 : : 0 0 0 1 1 1 : : 0 0 0 0 0 0 : : 0 0 0 1 1 0 0 1 1 0 0 g 7 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 0 0 g 8 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 1 1 1 1 0 0 0 0 r 7 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 1 1 1 1 0 0 0 0 r 8 b1023 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 blue b1022 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 b1021 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 : : : : : : : : : : : : : : : : : : b3~ b1020 : : : : : : : : : : : : : : : : : : b2 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 b1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 dark light b0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 black gray scale of blue g1023 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 green g1022 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 g1021 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 : : : : : : : : : : : : : : : : : : g3~ g1020 : : : : : : : : : : : : : : : : : : g2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 g1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 dark light g0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 black gray scale of green r1023 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 red r1022 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 r1021 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 1 : : : : : : : : : : : : : : : : : : r3~ r1020 : : : : : : : : : : : : : : : : : : r2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 r1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 dark light r0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 black gray scale of red - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 white - 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 yellow - 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 magenta - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 red - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 cyan - 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 green - 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 blue - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 black basic color b 9 b 6 b 5 b 4 b 3 b 2 b 1 b 0 g 9 g 6 g 5 g 4 g 3 g 2 g 1 g 0 r 9 r 6 r 5 r 4 r 3 r 2 r 1 r 0 blue green red gray scale level data signal display (10bit) color note (1) definition of gray : rn : red gray, gn : green gray, bn : blue gray (n = gr ay level) input signal : 0 = low level voltage, 1 = high leve l voltage www.datasheet.co.kr datasheet pdf - http://www..net/
23/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 6.1 timing parameters ( de only mode ) note (1) this product is de only mode. the input of hsync & vsync signal does not have an effect on normal operation. (2) test point : ttl control signal and clk at lvds tx input terminal in system (3) internal vcc = 3.3v (4) when operating the panel, de signals have to th e same period. 6. interface timing - clocks 1075 1040 993 t h horizontal total - clocks 960 960 960 t hd active display period horizontal display term - lines 1245 1235 1209 t vb vertical total - lines 1200 1200 1200 t vd active display period vertical display term - hz 63 60 57 f v vsync - khz 78.5 74 69 f h hsync - mhz 81.0 77.0 72.0 1/t c frequency clock note unit max. typ. min. symbol item signal www.datasheet.co.kr datasheet pdf - http://www..net/
24/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 6.2 timing diagrams of interface signal ( de only m ode ) data signals de t vd t v t h d clk t c de t hd t vb 0.5 v cc t es t ds t dh t ch t cl t c de display data d clk 0.5 v cc 0.5 v cc www.datasheet.co.kr datasheet pdf - http://www..net/
25/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 6.3 power on/off sequence to prevent a latch-up or dc operation of the lcd mo dule, the power on/off sequence should be as the diagram below. t1 : v dd rising time from 10% to 90% t2 : the time from v dd to valid data at power on. t3 : the time from valid data off to v dd off at power off. t4 : v dd off time for windows restart t5 : the time from valid data to b/l enable at powe r on. t6 : the time from valid data off to b/l disable at power off. the supply voltage of the external system for the m odule input should be the same as the definition of v dd . apply the lamp voltage within the lcd operation ran ge. when the back light turns on before the lcd operation or the lcd turns off befor e the back light turns off, the display may momentarily show abnormal screen. in case of v dd = off level, please keep the level of input signals low or keep a high impedance. t4 should be measured after the module has been ful ly discharged between power off and on period. interface signal should not be kept at high impedan ce when the power is on. 300 ? ?? ? ? t1 ? 10msec 0 ? t2 ? 50msec 0 ? t3 ? 50msec 1sec ? t4 back-light (recommended) 500msec ? t5 100msec ? t6 www.datasheet.co.kr datasheet pdf - http://www..net/
26/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 6.4 inverter power sequence 1) rising time of v in 2) on/off sequence of v in 3) power sequence on/off 90% t3 t3, t4 ? 500msec dimmer t5 t5, t6 ? 0 sec t4 t6 v in 0v t1 v in 10% 90% t1 ? 20 msec 0v v in v in ? 0.7v t2 t2 ? 200 msec vin dimmer on/off www.datasheet.co.kr datasheet pdf - http://www..net/
27/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 6.5 vdd power dip condition 4.5v v dd 5.5v if v dd (typ.) x 80% v cc v dd (typ) x 90% then, 0

28/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 7. outline dimension [ refer to the next pages. ] www.datasheet.co.kr datasheet pdf - http://www..net/
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www.datasheet.co.kr datasheet pdf - http://www..net/
31/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information (a) when the module is assembled, it should be atta ched to the system firmly using all mounting holes. be careful not to twist a nd bend the module. (b) because the inverter uses high voltages, it sho uld be disconnected from power source before it is assembled or disassembled. (c) refrain from strong mechanical shock and / or a ny force to the module. in addition to damage, it may cause improper operat ion or damage to the module and ccft back light. (d) note that polarizer films are very fragile and could be damaged easily. do not press or scratch the surface harder than a h b pencil lead. (e) wipe off water droplets or oil immediately. if you leave the droplets for a long time, staining or discoloration may occur. (f) if the surface of the polarizer is dirty, clean it using absorbent cotton or soft cloth. (g) desirable cleaners are water, ipa (isopropyl al cohol) or hexane. do not use ketone type materials (ex. acetone), ethy l alcohol, toluene, ethyl acid or methyl chloride. it might cause permanent damage to the polarizer due to chemical reaction. (h) if the liquid crystal material leaks from the p anel, it should be kept away from the eyes or mouth . in case of contact with ha nds, legs or clothes, it must be washed away with soap thoroughly. (i) protect the module from static, or the cmos gat e array ic would be damaged. (j) use finger-stalls with soft gloves in order to keep display clean during the incoming inspection and assembly process. (k) do not disassemble the module. (l) do not pull or fold the lamp wire. (m) do not adjust the variable resistor located on the module. (n) protection film for polarizer on the module sho uld be slowly peeled off just before use so that the electrostatic charge can be minimized. (o) pins of i/f connector should not be touched dir ectly with bare hands. 8. general precautions 8.1 handling www.datasheet.co.kr datasheet pdf - http://www..net/
32/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 8.2 storage (a) do not leave the module in high temperature, an d high humidity for a long time. it is highly recommended to store the module with t emperature from 0 to 35 and relative humidity of less than 70%. (b) do not store the tft-lcd module in direct sunli ght. (c) the module should be stored in a dark place. it is prohibited to apply sunlight or fluorescent light in storing. 8.3 operation (a) do not connect or disconnect the module in the "power on" condition. (b) power supply should always be turned on/off by the item 6.3 "power on/off sequence" (c) module has high frequency circuits. sufficient suppression to the electromagnetic interference should be done by system manufacturers . grounding and shielding methods may be important to minimize the interferen ce. (d) the cable between the back light connector and its inverter power supply should be connected directly with a minimized length. a lo nger cable between the back light and the inverter may cause lower lum inance of lamp (ccft) and may require higher startup voltage (vs). 8.4 operation condition guide (a) the lcd product should be operated under normal conditions. normal condition is defined as below; - temperature : 20 15 - humidity : 65 20% - display pattern : continually changing pattern (no t stationary) (b) if the product will be used in extreme conditio ns such as high temperature, humidity, display patterns or operation time etc.., it is strongly recommended to contact sec for application engineering advice. otherwise, its reliability and function may not be guaranteed. extreme conditions are commonly found at airports, transit stations, banks, stock market, an d controlling systems. www.datasheet.co.kr datasheet pdf - http://www..net/
33/33 page pi-002-LTM270CS01 doc. no LTM270CS01 model product information product information 8.5 others (a) ultra-violet ray filter is necessary for outdoo r operation. (b) avoid condensation of water. it may result in i mproper operation or disconnection of electrode. (c) do not exceed the absolute maximum rating value . ( supply voltage variation, input voltage variation, variation in part contents and environmental temperature, and so on) otherwise the module may be damaged. (d) if the module keeps displaying the same pattern for a long period of time, the image may be "stuck" to the screen. to avoid image sticking, it is recommended to use a screen saver. (e) this module has its circuitry pcb's on the rear side and should be handled carefully in order not to be stressed. (f) please contact sec in advance when you display the same pattern for a long time. www.datasheet.co.kr datasheet pdf - http://www..net/

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